GB2264578B - Nonvolatile semiconductor memory device - Google Patents

Nonvolatile semiconductor memory device

Info

Publication number
GB2264578B
GB2264578B GB9209426A GB9209426A GB2264578B GB 2264578 B GB2264578 B GB 2264578B GB 9209426 A GB9209426 A GB 9209426A GB 9209426 A GB9209426 A GB 9209426A GB 2264578 B GB2264578 B GB 2264578B
Authority
GB
United Kingdom
Prior art keywords
memory device
semiconductor memory
nonvolatile semiconductor
nonvolatile
semiconductor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
GB9209426A
Other languages
English (en)
Other versions
GB2264578A (en
GB9209426D0 (en
GB2264578A8 (en
Inventor
Jin-Ki Kim
Kang-Deog Suh
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Samsung Electronics Co Ltd
Original Assignee
Samsung Electronics Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Samsung Electronics Co Ltd filed Critical Samsung Electronics Co Ltd
Publication of GB9209426D0 publication Critical patent/GB9209426D0/en
Publication of GB2264578A publication Critical patent/GB2264578A/en
Publication of GB2264578A8 publication Critical patent/GB2264578A8/en
Application granted granted Critical
Publication of GB2264578B publication Critical patent/GB2264578B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11CSTATIC STORES
    • G11C16/00Erasable programmable read-only memories
    • G11C16/02Erasable programmable read-only memories electrically programmable
    • G11C16/06Auxiliary circuits, e.g. for writing into memory
    • G11C16/34Determination of programming status, e.g. threshold voltage, overprogramming or underprogramming, retention
    • G11C16/3436Arrangements for verifying correct programming or erasure
    • G11C16/3468Prevention of overerasure or overprogramming, e.g. by verifying whilst erasing or writing
    • G11C16/3486Circuits or methods to prevent overprogramming of nonvolatile memory cells, e.g. by detecting onset or cessation of current flow in cells and using the detector output to terminate programming
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11CSTATIC STORES
    • G11C16/00Erasable programmable read-only memories
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11CSTATIC STORES
    • G11C16/00Erasable programmable read-only memories
    • G11C16/02Erasable programmable read-only memories electrically programmable
    • G11C16/06Auxiliary circuits, e.g. for writing into memory
    • G11C16/10Programming or data input circuits
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11CSTATIC STORES
    • G11C16/00Erasable programmable read-only memories
    • G11C16/02Erasable programmable read-only memories electrically programmable
    • G11C16/06Auxiliary circuits, e.g. for writing into memory
    • G11C16/34Determination of programming status, e.g. threshold voltage, overprogramming or underprogramming, retention
    • G11C16/3436Arrangements for verifying correct programming or erasure
    • G11C16/3454Arrangements for verifying correct programming or for detecting overprogrammed cells
    • G11C16/3459Circuits or methods to verify correct programming of nonvolatile memory cells
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11CSTATIC STORES
    • G11C16/00Erasable programmable read-only memories
    • G11C16/02Erasable programmable read-only memories electrically programmable
    • G11C16/06Auxiliary circuits, e.g. for writing into memory
    • G11C16/34Determination of programming status, e.g. threshold voltage, overprogramming or underprogramming, retention
    • G11C16/3436Arrangements for verifying correct programming or erasure
    • G11C16/3468Prevention of overerasure or overprogramming, e.g. by verifying whilst erasing or writing
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11CSTATIC STORES
    • G11C2216/00Indexing scheme relating to G11C16/00 and subgroups, for features not directly covered by these groups
    • G11C2216/12Reading and writing aspects of erasable programmable read-only memories
    • G11C2216/14Circuits or methods to write a page or sector of information simultaneously into a nonvolatile memory, typically a complete row or word line in flash memory
GB9209426A 1992-02-21 1992-05-01 Nonvolatile semiconductor memory device Expired - Fee Related GB2264578B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019920002689A KR950000273B1 (ko) 1992-02-21 1992-02-21 불휘발성 반도체 메모리장치 및 그 최적화 기입방법

Publications (4)

Publication Number Publication Date
GB9209426D0 GB9209426D0 (en) 1992-06-17
GB2264578A GB2264578A (en) 1993-09-01
GB2264578A8 GB2264578A8 (en) 1995-09-18
GB2264578B true GB2264578B (en) 1996-01-03

Family

ID=19329334

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9209426A Expired - Fee Related GB2264578B (en) 1992-02-21 1992-05-01 Nonvolatile semiconductor memory device

Country Status (10)

Country Link
US (1) US5299162A (de)
JP (2) JP2872484B2 (de)
KR (1) KR950000273B1 (de)
CN (1) CN1032283C (de)
DE (1) DE4213731C2 (de)
FR (1) FR2687828B1 (de)
GB (1) GB2264578B (de)
IT (1) IT1255108B (de)
RU (1) RU2097842C1 (de)
TW (1) TW204415B (de)

Families Citing this family (109)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5357462A (en) * 1991-09-24 1994-10-18 Kabushiki Kaisha Toshiba Electrically erasable and programmable non-volatile semiconductor memory with automatic write-verify controller
US6781895B1 (en) * 1991-12-19 2004-08-24 Kabushiki Kaisha Toshiba Non-volatile semiconductor memory device and memory system using the same
US5361227A (en) * 1991-12-19 1994-11-01 Kabushiki Kaisha Toshiba Non-volatile semiconductor memory device and memory system using the same
JP2904645B2 (ja) * 1992-05-28 1999-06-14 株式会社東芝 不揮発性半導体メモリ
US5740395A (en) * 1992-10-30 1998-04-14 Intel Corporation Method and apparatus for cleaning up a solid state memory disk storing floating sector data
US5479633A (en) * 1992-10-30 1995-12-26 Intel Corporation Method of controlling clean-up of a solid state memory disk storing floating sector data
KR960000616B1 (ko) * 1993-01-13 1996-01-10 삼성전자주식회사 불휘발성 반도체 메모리 장치
JP3373632B2 (ja) * 1993-03-31 2003-02-04 株式会社東芝 不揮発性半導体記憶装置
US6240018B1 (en) 1993-03-31 2001-05-29 Kabushiki Kaisha Toshiba Nonvolatile semiconductor memory device having verify function
US5471423A (en) * 1993-05-17 1995-11-28 Nippon Steel Corporation Non-volatile semiconductor memory device
US5555204A (en) * 1993-06-29 1996-09-10 Kabushiki Kaisha Toshiba Non-volatile semiconductor memory device
US5623620A (en) * 1993-06-30 1997-04-22 Intel Corporation Special test modes for a page buffer shared resource in a memory device
JP3462894B2 (ja) * 1993-08-27 2003-11-05 株式会社東芝 不揮発性半導体メモリ及びそのデータプログラム方法
US6091639A (en) * 1993-08-27 2000-07-18 Kabushiki Kaisha Toshiba Non-volatile semiconductor memory device and data programming method
JP3512833B2 (ja) * 1993-09-17 2004-03-31 株式会社東芝 不揮発性半導体記憶装置
EP0661814B1 (de) * 1993-12-28 1999-03-31 STMicroelectronics S.r.l. Zähl-Ende Detektionsvorrichtung, insbesondere für nicht flüchtige Speicher
JP3737525B2 (ja) * 1994-03-11 2006-01-18 株式会社東芝 半導体記憶装置
JP3563452B2 (ja) * 1994-08-10 2004-09-08 株式会社東芝 セル閾値分布検知回路およびセル閾値分布検知方法
EP0700051A1 (de) * 1994-08-31 1996-03-06 STMicroelectronics S.r.l. Schaltkreis zum Programmieren einzelner Bits von Worten in einem nichtflüchtigen Speicher
JP3199989B2 (ja) * 1994-09-30 2001-08-20 株式会社東芝 不揮発性半導体記憶装置とその過書込み救済方法
DE69524257T2 (de) * 1995-01-05 2002-12-12 Macronix Int Co Ltd Fortgeschrittene programmierverifikation für flash-speicher mit seitenmodus
JP2755197B2 (ja) * 1995-01-13 1998-05-20 日本電気株式会社 半導体不揮発性記憶装置
US6475846B1 (en) 1995-05-18 2002-11-05 Texas Instruments Incorporated Method of making floating-gate memory-cell array with digital logic transistors
KR0164376B1 (ko) * 1995-07-28 1999-02-18 김광호 불휘발성 반도체 메모리의 기준 비트라인 셀
KR0169412B1 (ko) * 1995-10-16 1999-02-01 김광호 불휘발성 반도체 메모리 장치
KR0169420B1 (ko) * 1995-10-17 1999-02-01 김광호 불 휘발성 반도체 메모리의 데이타 리드 방법 및 그에 따른 회로
KR0172366B1 (ko) * 1995-11-10 1999-03-30 김광호 불휘발성 반도체 메모리 장치의 독출 및 프로그램 방법과 그 회로
KR100208433B1 (ko) * 1995-12-27 1999-07-15 김영환 플래쉬 메모리 소자 및 그를 이용한 프로그램 방법
US5638326A (en) * 1996-04-05 1997-06-10 Advanced Micro Devices, Inc. Parallel page buffer verify or read of cells on a word line using a signal from a reference cell in a flash memory device
JP3200012B2 (ja) * 1996-04-19 2001-08-20 株式会社東芝 記憶システム
EP0904589B1 (de) * 1996-06-14 2004-10-06 Macronix International Co., Ltd. Schwebegatterspeicheranordnung mit seitenpuffer mit niedrigem strom
US5793677A (en) * 1996-06-18 1998-08-11 Hu; Chung-You Using floating gate devices as select gate devices for NAND flash memory and its bias scheme
US5912489A (en) * 1996-06-18 1999-06-15 Advanced Micro Devices, Inc. Dual source side polysilicon select gate structure utilizing single tunnel oxide for NAND array flash memory
US5648930A (en) * 1996-06-28 1997-07-15 Symbios Logic Inc. Non-volatile memory which is programmable from a power source
KR100193898B1 (ko) * 1996-06-29 1999-06-15 김영환 플래쉬 메모리 장치
US5661687A (en) * 1996-09-30 1997-08-26 Symbios Logic Inc. Drain excluded EPROM cell
US5838616A (en) * 1996-09-30 1998-11-17 Symbios, Inc. Gate edge aligned EEPROM transistor
JP3481817B2 (ja) * 1997-04-07 2003-12-22 株式会社東芝 半導体記憶装置
DE19731954C2 (de) * 1997-07-24 2000-08-24 Bosch Gmbh Robert Verfahren zur Erkennung von fehlprogrammierten Speicherzellen eines Speichers
US6137153A (en) * 1998-02-13 2000-10-24 Advanced Micro Devices, Inc. Floating gate capacitor for use in voltage regulators
US6040993A (en) * 1998-02-23 2000-03-21 Macronix International Co., Ltd. Method for programming an analog/multi-level flash EEPROM
JP2000011674A (ja) * 1998-06-25 2000-01-14 Sony Corp ラッチ形センス回路及びプログラム・ベリファイ回路
JP3888808B2 (ja) * 1999-08-16 2007-03-07 富士通株式会社 Nand型不揮発性メモリ
DE10043397B4 (de) * 1999-09-06 2007-02-08 Samsung Electronics Co., Ltd., Suwon Flash-Speicherbauelement mit Programmierungszustandsfeststellungsschaltung und das Verfahren dafür
FR2803080A1 (fr) * 1999-12-22 2001-06-29 St Microelectronics Sa Memoire flash programmable page par page
US6327183B1 (en) 2000-01-10 2001-12-04 Advanced Micro Devices, Inc. Nonlinear stepped programming voltage
US6269025B1 (en) 2000-02-09 2001-07-31 Advanced Micro Devices, Inc. Memory system having a program and erase voltage modifier
US6246610B1 (en) * 2000-02-22 2001-06-12 Advanced Micro Devices, Inc. Symmetrical program and erase scheme to improve erase time degradation in NAND devices
US6295228B1 (en) 2000-02-28 2001-09-25 Advanced Micro Devices, Inc. System for programming memory cells
US6304487B1 (en) 2000-02-28 2001-10-16 Advanced Micro Devices, Inc. Register driven means to control programming voltages
US6246611B1 (en) 2000-02-28 2001-06-12 Advanced Micro Devices, Inc. System for erasing a memory cell
JP3940570B2 (ja) * 2001-07-06 2007-07-04 株式会社東芝 半導体記憶装置
JP2003030993A (ja) * 2001-07-17 2003-01-31 Toshiba Corp 半導体記憶装置
US6992938B1 (en) 2001-12-06 2006-01-31 Virage Logic Corporation Methods and apparatuses for test circuitry for a dual-polarity non-volatile memory cell
US6788574B1 (en) 2001-12-06 2004-09-07 Virage Logic Corporation Electrically-alterable non-volatile memory cell
US6850446B1 (en) 2001-12-06 2005-02-01 Virage Logic Corporation Memory cell sensing with low noise generation
US7130213B1 (en) 2001-12-06 2006-10-31 Virage Logic Corporation Methods and apparatuses for a dual-polarity non-volatile memory cell
US6842375B1 (en) 2001-12-06 2005-01-11 Virage Logic Corporation Methods and apparatuses for maintaining information stored in a non-volatile memory cell
JP4202120B2 (ja) * 2002-12-27 2008-12-24 セイコーインスツル株式会社 集積回路の最適化設計装置
KR100512178B1 (ko) * 2003-05-28 2005-09-02 삼성전자주식회사 플렉서블한 열 리던던시 스킴을 갖는 반도체 메모리 장치
US6917542B2 (en) * 2003-07-29 2005-07-12 Sandisk Corporation Detecting over programmed memory
US7139198B2 (en) * 2004-01-27 2006-11-21 Sandisk Corporation Efficient verification for coarse/fine programming of non-volatile memory
US7002843B2 (en) * 2004-01-27 2006-02-21 Sandisk Corporation Variable current sinking for coarse/fine programming of non-volatile memory
US7110301B2 (en) * 2004-05-07 2006-09-19 Samsung Electronics Co., Ltd. Non-volatile semiconductor memory device and multi-block erase method thereof
KR100632946B1 (ko) * 2004-07-13 2006-10-12 삼성전자주식회사 불 휘발성 메모리 장치 및 그것의 프로그램 방법
KR100632947B1 (ko) * 2004-07-20 2006-10-12 삼성전자주식회사 불 휘발성 메모리 장치 및 그것의 프로그램 방법
US7272050B2 (en) 2004-08-10 2007-09-18 Samsung Electronics Co., Ltd. Non-volatile memory device and erase method of the same
KR100648277B1 (ko) * 2004-12-30 2006-11-23 삼성전자주식회사 프로그램 시간을 줄일 수 있는 플래시 메모리 장치
KR100666172B1 (ko) * 2005-01-04 2007-01-09 삼성전자주식회사 로드 공급 와이어드 오어 구조를 가지는 불휘발성 반도체메모리 장치와, 이에 대한 구동방법
KR100567158B1 (ko) * 2005-01-10 2006-04-03 삼성전자주식회사 캐쉬기능을 가지는 와이어드 오어 타입의 페이지 버퍼 및이를 포함하는 불휘발성 반도체 메모리 장치, 그리고,이를 이용한 프로그램 방법
DE602005011628D1 (de) * 2005-10-10 2009-01-22 Hynix Semiconductor Inc Verfahren zur Programmierung und Verifizierung von Zellen eines nicht-flüchtigen Speicher und ein entsprechender NAND Flash Speicher
US7301821B1 (en) * 2005-10-13 2007-11-27 Actel Corporation Volatile data storage in a non-volatile memory cell array
KR100791341B1 (ko) * 2006-09-04 2008-01-03 삼성전자주식회사 비휘발성 메모리 장치의 기입 방법 및 그 방법을 사용하는비휘발성 메모리 장치
KR100771882B1 (ko) * 2006-09-06 2007-11-01 삼성전자주식회사 멀티-레벨 불휘발성 메모리 장치의 프로그램 방법
KR100771883B1 (ko) * 2006-09-06 2007-11-01 삼성전자주식회사 멀티-레벨 불휘발성 메모리 장치 및 프로그램 방법
US7593259B2 (en) * 2006-09-13 2009-09-22 Mosaid Technologies Incorporated Flash multi-level threshold distribution scheme
US7817470B2 (en) * 2006-11-27 2010-10-19 Mosaid Technologies Incorporated Non-volatile memory serial core architecture
KR100816162B1 (ko) * 2007-01-23 2008-03-21 주식회사 하이닉스반도체 낸드 플래시 메모리 장치 및 셀 특성 개선 방법
US7639540B2 (en) 2007-02-16 2009-12-29 Mosaid Technologies Incorporated Non-volatile semiconductor memory having multiple external power supplies
US20080201588A1 (en) * 2007-02-16 2008-08-21 Mosaid Technologies Incorporated Semiconductor device and method for reducing power consumption in a system having interconnected devices
US7646636B2 (en) 2007-02-16 2010-01-12 Mosaid Technologies Incorporated Non-volatile memory with dynamic multi-mode operation
US7577059B2 (en) * 2007-02-27 2009-08-18 Mosaid Technologies Incorporated Decoding control with address transition detection in page erase function
US7804718B2 (en) * 2007-03-07 2010-09-28 Mosaid Technologies Incorporated Partial block erase architecture for flash memory
US7577029B2 (en) * 2007-05-04 2009-08-18 Mosaid Technologies Incorporated Multi-level cell access buffer with dual function
KR101321472B1 (ko) * 2007-07-23 2013-10-25 삼성전자주식회사 비휘발성 메모리 장치 및 그것의 프로그램 방법
JP4510072B2 (ja) * 2007-12-20 2010-07-21 力晶半導体股▲ふん▼有限公司 不揮発性半導体記憶装置とその書き込み方法
US7916544B2 (en) * 2008-01-25 2011-03-29 Micron Technology, Inc. Random telegraph signal noise reduction scheme for semiconductor memories
JP5086972B2 (ja) 2008-11-06 2012-11-28 力晶科技股▲ふん▼有限公司 不揮発性半導体記憶装置のためのページバッファ回路とその制御方法
JP2010134992A (ja) 2008-12-04 2010-06-17 Powerchip Semiconductor Corp 不揮発性半導体記憶装置とその書き込み方法
JP2010140521A (ja) 2008-12-09 2010-06-24 Powerchip Semiconductor Corp 不揮発性半導体記憶装置とその読み出し方法
JP5231972B2 (ja) 2008-12-18 2013-07-10 力晶科技股▲ふん▼有限公司 不揮発性半導体記憶装置
JP2011170927A (ja) * 2010-02-19 2011-09-01 Toshiba Corp 半導体記憶装置
KR101139133B1 (ko) * 2010-07-09 2012-04-30 에스케이하이닉스 주식회사 반도체 메모리 장치 및 이의 동작 방법
US9424938B2 (en) * 2011-06-09 2016-08-23 Micron Technology, Inc. Reduced voltage nonvolatile flash memory
US9588883B2 (en) 2011-09-23 2017-03-07 Conversant Intellectual Property Management Inc. Flash memory system
JP2013143155A (ja) 2012-01-06 2013-07-22 Powerchip Technology Corp 不揮発性半導体記憶装置とその書き込み方法
US10061640B1 (en) 2013-03-12 2018-08-28 Western Digital Technologies, Inc. Soft-decision input generation for data storage systems
US8924824B1 (en) 2013-03-12 2014-12-30 Western Digital Technologies, Inc. Soft-decision input generation for data storage systems
US9542258B1 (en) 2013-03-15 2017-01-10 Western Digital Technologies, Inc. System and method for error-minimizing voltage threshold selection
US9270296B1 (en) 2013-11-13 2016-02-23 Western Digital Technologies, Inc. Method and system for soft decoding through single read
US9007854B1 (en) 2013-12-09 2015-04-14 Western Digital Technologies, Inc. Method and system for optimized soft decoding in a data storage device
JP5745136B1 (ja) 2014-05-09 2015-07-08 力晶科技股▲ふん▼有限公司 不揮発性半導体記憶装置とその書き込み方法
JP5931236B1 (ja) 2015-02-05 2016-06-08 力晶科技股▲ふん▼有限公司 半導体装置の制御回路及び方法、並びに半導体装置
JP2016162925A (ja) 2015-03-03 2016-09-05 力晶科技股▲ふん▼有限公司 Momキャパシタ回路及び半導体装置
JP5909294B1 (ja) 2015-03-11 2016-04-26 力晶科技股▲ふん▼有限公司 不揮発性記憶装置のための書き込み回路及び方法、並びに不揮発性記憶装置
CN105719693B (zh) * 2016-01-22 2019-09-17 清华大学 Nand存储器的多比特编程方法及装置
JP6677786B1 (ja) 2018-11-20 2020-04-08 力晶積成電子製造股▲ふん▼有限公司Powerchip Semiconductor Manufacturing Corporation ページバッファ回路及び不揮発性記憶装置
JP6757447B1 (ja) 2019-06-12 2020-09-16 力晶積成電子製造股▲ふん▼有限公司Powerchip Semiconductor Manufacturing Corporation フェイルビット数計数回路及び不揮発性半導体記憶装置
KR102483906B1 (ko) * 2021-07-14 2022-12-30 서울시립대학교 산학협력단 Nand 플래시 메모리와 sram이 융합된 nas 메모리 셀 및 이를 이용한 nas 메모리 어레이

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2053611A (en) * 1979-07-02 1981-02-04 Mostek Corp Programmable read only memory integrated circuit with bit-check and de-programming modes and methods for programming and testing said circuit
GB2214379A (en) * 1988-01-12 1989-08-31 Intel Corp Voltage margining circuit for flash eprom
GB2215155A (en) * 1988-02-17 1989-09-13 Intel Corp Program/erase selection for flash memory
EP0449610A2 (de) * 1990-03-30 1991-10-02 Kabushiki Kaisha Toshiba EEPROM mit Schwellwertmessschaltung

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63251999A (ja) * 1987-04-08 1988-10-19 Mitsubishi Electric Corp 半導体記憶装置
JP2534733B2 (ja) * 1987-10-09 1996-09-18 日本電気株式会社 不揮発性半導体記憶装置
JP2724164B2 (ja) * 1988-08-05 1998-03-09 株式会社東芝 Nand型e▲上2▼prom及びそのデータ書き込み方法
US4996669A (en) * 1989-03-08 1991-02-26 Kabushiki Kaisha Toshiba Electrically erasable programmable read-only memory with NAND memory cell structure
US5075890A (en) * 1989-05-02 1991-12-24 Kabushiki Kaisha Toshiba Electrically erasable programmable read-only memory with nand cell
JP3448051B2 (ja) * 1990-03-31 2003-09-16 株式会社東芝 不揮発性半導体記憶装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2053611A (en) * 1979-07-02 1981-02-04 Mostek Corp Programmable read only memory integrated circuit with bit-check and de-programming modes and methods for programming and testing said circuit
GB2214379A (en) * 1988-01-12 1989-08-31 Intel Corp Voltage margining circuit for flash eprom
GB2215155A (en) * 1988-02-17 1989-09-13 Intel Corp Program/erase selection for flash memory
EP0449610A2 (de) * 1990-03-30 1991-10-02 Kabushiki Kaisha Toshiba EEPROM mit Schwellwertmessschaltung

Also Published As

Publication number Publication date
GB2264578A (en) 1993-09-01
KR930018589A (ko) 1993-09-22
GB9209426D0 (en) 1992-06-17
DE4213731A1 (de) 1993-08-26
CN1032283C (zh) 1996-07-10
JPH09147582A (ja) 1997-06-06
US5299162A (en) 1994-03-29
KR950000273B1 (ko) 1995-01-12
DE4213731C2 (de) 2002-05-08
JP2872484B2 (ja) 1999-03-17
IT1255108B (it) 1995-10-20
JP3228711B2 (ja) 2001-11-12
JPH1186577A (ja) 1999-03-30
FR2687828A1 (fr) 1993-08-27
FR2687828B1 (fr) 1994-04-29
GB2264578A8 (en) 1995-09-18
CN1075572A (zh) 1993-08-25
ITMI921000A1 (it) 1993-10-28
ITMI921000A0 (it) 1992-04-28
RU2097842C1 (ru) 1997-11-27
TW204415B (en) 1993-04-21

Similar Documents

Publication Publication Date Title
GB2264578B (en) Nonvolatile semiconductor memory device
EP0572240A3 (en) Nonvolatile semiconductor memory device
KR970005694B1 (en) Semiconductor memory device
GB2250360B (en) Nonvolatile semiconductor memory device
KR950008480B1 (en) Semiconductor memory device
KR970002002B1 (en) Semiconductor memory device
EP0463580A3 (en) Non-volatile semiconductor memory device
EP0509811A3 (en) Semiconductor memory device
KR960016104B1 (en) Semiconductor memory device
EP0550751A4 (en) Nonvolatile semiconductor memory
EP0606650A3 (en) Nonvolatile semiconductor memory device.
GB9304655D0 (en) Semiconductor memory device
EP0572026A3 (de) Halbleiterspeicheranordnung.
KR970001894B1 (en) Semiconductor memory device
EP0591850A3 (de) Halbleiterspeicheranordnung.
EP0573003A3 (de) Nichtflüchtige Halbleiterspeicheranordnung.
EP0598400A3 (de) Halbleiterspeicheranordnung.
KR100251036B1 (en) Semiconductor memory device
EP0481392A3 (en) Semiconductor non-volatile memory device
KR960011941B1 (en) Non-volatile memory semiconductor memory device having the non-volatile memory
KR960001785B1 (en) Semiconductor memory device
EP0499460A3 (en) Semiconductor memory device
EP0539184A3 (en) Non-volatile semiconductor memory
EP0570977A3 (de) Halbleiterspeicheranordnung.
EP0520425A3 (en) Semiconductor memory device

Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20090501